Allelochemicals are active in preventing
(a) herbivore feeding.
(b) germination of plant competitors.
(c) infection by pathogens.
(d) all of the above.
(d) all of the above.
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Which of the letters in the above figure
represents male structures? a. A b. B c. C d. D e. more than one of these
Of the 20 standard amino acids, only ___________ is not optically active. The reason is that its side chain ___________.
A) alanine; is a simple methyl group B) glycine; is a hydrogen atom C) glycine; is unbranched D) lysine; contains only nitrogen E) proline; forms a covalent bond with the amino group
In the biological sciences, the null hypothesis is usually rejected if the P value is _____
A. Greater than 1 B. Less than 0.30 C. Less than 0.95 D. Less than 0.05 E. Less than 1
Four of the five answers listed below are energy sources for muscles. Select the exception
a. ATP b. creatine phosphate c. fermentation d. aerobic respiration e. sarcomeres